I'm down in the underground now and definitely getting into it a bit more. I have to be honest, the atmosphere is so good that I've jumped and screamed like a girl more than a few times when a monster has jumped out at me or I was suddenly shot from the shadows. :lol
I have the AK47 now which is improving the gunplay, but the lack of health is really punishing. I haven't had over 30% health in a good hour, I'd guess, as all I can find on bodies is guns and ammo. This makes the game tense, which is good, but it's not so fun when I have to die and re-load a save six or seven times just to progress. Also, I'm playing on the easiest difficulty, so there's nothing else for me to fall back on.
But, despite all of that, I am now finding it oddly compelling and want to continue playing.